Hey Jan (we met very briefly at Ubicomp, dunno if you remember) -- this is a topic I'm quite interested in, and was curious if you could clarify this part:

Whilst topping up game credits by mobile phone is possible (it may even already be offered by the game companies - I've not researched the topic), it is a less compelling proposition where most people in the market are using pre-pay.

Do you mean that the people who would top up game credits are already using pre-pay for their keitai? Or that they are already using it for the games themselves? What makes it a less compelling proposition?

Sorry if I'm being dense. And many thanks for yr blog, which is equal parts poetry and prognosis.